Extensions->plugin managerSearch - BF Auction ProOn the right hand side, make sure you have correctly selected either BF Auction Pro or BF Auction depending on the whether you are using the purchased version or the free version.

oh yes!its working, tell me, is it possible to have one search for all cagories?

In your Auciton menu item, if you don't select a category then by default it will be for all categories.Potentially you could have this as another menu item that is hidden (eg. in a menu that does not have a module to display it).

I try to remove BF auction and then search not working again.. I install again and now not working.. Im not shoore anymore if was working at all...so, I dont need BF Auction if I work on Pro version?I select in plugin Pro BF.I put ID from menu in plugin.is that right?

I've taken a look at your site, the problem was you are using BF Auction ProTrial, however the search plugin was looking for the tables used in the purchased version. I'd modified the search plugin, and installed another copy that is for the trial version. Seems to be working correctly now.